When I try to start Demul, I get the error! HRESULT = 887a0004 Create Device And Swap Chain failed

I'm thinking this is because I don't have DX11, but rather DX12.
Anybody know a workaround for this?
Thank you
Additionally, I can pay a freelancer to remote control my PC to ultimately get this to work, for that matter

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Also, is it a simple matter of downgrading my DirectX?